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AUSCERT External Security Bulletin Redistribution
ESB-2020.3730
JSA11075 - 2020-10 Security Bulletin: Junos OS and Junos OS Evolved: RPD
can crash due to a slow memory leak. (CVE-2020-1678)
29 October 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Junos OS
Publisher: Juniper Networks
Operating System: Juniper
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-1678
Original Bulletin:
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA11075
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2020-10 Security Bulletin: Junos OS and Junos OS Evolved: RPD can crash due to a slow memory leak. (CVE-2020-1678)
Article ID : JSA11075
Last Updated: 28 Oct 2020
Version : 3.0
Product Affected:
This issue affects Junos OS 19.4, 20.1. This issue affects Junos OS Evolved
19.4-EVO, 20.1-EVO.
Problem:
On Juniper Networks Junos OS and Junos OS Evolved platforms with EVPN
configured, receipt of specific BGP packets causes a slow memory leak. If the
memory is exhausted the rpd process might crash.
If the issue occurs, the memory leak could be seen by executing the "show task
memory detail | match policy | match evpn" command multiple times to check if
memory (Alloc Blocks value) is increasing.
root@device> show task memory detail | match policy | match evpn
- ------------------------ Allocator Memory Report ------------------------
Name | Size | Alloc DTXP Size | Alloc Blocks | Alloc Bytes | MaxAlloc Blocks |
MaxAlloc Bytes
Policy EVPN Params 20 24 3330678 79936272 3330678 79936272
root@device> show task memory detail | match policy | match evpn
- ------------------------ Allocator Memory Report ------------------------
Name | Size | Alloc DTXP Size | Alloc Blocks | Alloc Bytes | MaxAlloc Blocks |
MaxAlloc Bytes
Policy EVPN Params 20 24 36620255 878886120 36620255 878886120
This issue affects:
Juniper Networks Junos OS
o 19.4 versions prior to 19.4R2;
o 20.1 versions prior to 20.1R1-S4, 20.1R2;
Juniper Networks Junos OS Evolved:
o 19.4 versions;
o 20.1 versions prior to 20.1R1-S4-EVO, 20.1R2-EVO;
o 20.2 versions prior to 20.2R1-EVO;
This issue does not affect:
Juniper Networks Junos OS releases prior to 19.4R1.
Juniper Networks Junos OS Evolved releases prior to 19.4R1-EVO.
The example of the configuration stanza affected by this issue is as follows:
[protocols evpn]
Juniper SIRT is not aware of any malicious exploitation of this vulnerability.
This issue was seen during production usage.
This issue has been assigned CVE-2020-1678 .
Solution:
The following software releases have been updated to resolve this specific
issue:
Junos OS: 19.4R2, 19.4R3, 20.1R1-S4, 20.1R2, 20.2R1 and all subsequent
releases.
Junos OS Evolved: 20.1R1-S4-EVO, 20.1R2-EVO, 20.2R1-EVO, and all subsequent
releases.
This issue is being tracked as 1490269 .
Workaround:
There are no viable workarounds for this issue.
Implementation:
Software releases or updates are available for download at https://
www.juniper.net/support/downloads/ .
Modification History:
2020-10-14: Initial Publication.
CVSS Score:
6.5 (CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
Severity Level:
Medium
Severity Assessment:
Information for how Juniper Networks uses CVSS can be found at KB 16446 "Common
Vulnerability Scoring System (CVSS) and Juniper's Security Advisories."
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